Well, neither literally stops it, it would just make it look damn odd. Invading whilst the Senate is still there will obviously look like he has no reagrd foir the safety of the Senate, which is pretty bad.
And invading if there has been a deal concluded... well, that would just be a literal invasion of a sovereign world! There is no possible excuse they could use- the one they are using is peacekeeping. They can't do that if there is no keeping needed.
Not at all. Andran is an exceptionally busy man, so it takes about 30 minutes, but you are not unimportant yourself, so he's not put out coming to meet you.
VERY important man, Andran. He might be the most powerful Senator there is. Hundreds of worlds follow his word, and their Senators vote accordingly. Thousands more are influenced by him.
He's getting on a bit now, though; his cream-coloured robes are matched by a paler fade than normal, and wrinkles, and a white beard. But he;s far from downcast or inactive.
You are meeting within the grand meeting chamber of the lodge, a fantastic construction of wood and carapace, with a view overloking the entire city and the jungle around it.
He comes in flanked by two guards in blue.
"Senator Galahad..." he says. "What an unexpected pleasure!"
(Any actors I should keep in mind for Andran? And what world is he from?)
"Senator Andran, the pleasure is mine," Galahad says with a neat bow, presuming that the rest of the delegation will do the same. Galahad considers himself amongst one of the Senators influenced by Andran.
"It should not be too entirely unexpected, I have been intending to observe the proceedings since before their initiation. But an issue arose with my wife, and I could not be present. I apologize in advance, regardless of whether or not I need to."